I think you can find a better amp for that amount of money. A lot of audio people dont like audiobahn because they have ripped off other companies desings in the the past.
http://forum.elitecaraudio.com/showt...6&pagenumber=1
I seem them as a bose. Product isnt top notch but the marketing is. They just like to make everything chrome and shiny to attract people with looks instead of real performance. Kinda like body kits on slow cars. I watched a brand new on take a crap at a shop that was hooked up correctly. Didnt exactly instill me with confidence in the brand. Just my suggestion is something like
http://www.cardomain.com/item/JBLGTO3011
or
http://www.cardomain.com/item/KIC04KX2002
(just a few after a quick search on that site)
Im guessing your sub is 4 ohms. Also im not sure if you want a mono amp just for the subs or a 2 channel that could be used for main speakers in the future if you plan to use it like that.